unlimited music downloads. Third generation The first wave of the third-generation (Zune HD 16 GB and 32 GB) released in September 2009. On the same day, the 4.0 software update of the desktop software was released to support the new devices. In addition, it became possible for Zune Pass subscribers to stream tracks through a computer's web browser. Zune 4.0 also supports internet radio streams but this feature is disabled by default and can only be enabled by a third-party patch. This device release marked the first time Zune firmware was released for the Zune line that did not provide new features for older models. These models were given a firmware update as version 3.2. The second and last wave of the third-generation (Zune HD 64 GB) released in April 2010. The same day, desktop and firmware updates introduced SmartDJ and codec features. The firmware update brought picks and improved the TV-out experience on the Zune HD. From Summer 2010, United Airlines started to offer Zune in-flight audio by means of 21 playlists that are very similar to the Zune Channels offered on the Zune Marketplace. Each channel offers up to 3 hours of unique programming ranging from classic rock, contemporary pop, opera, electronica, piano jazz, and others. Discontinuation of Zune hardware On March 15, 2011, Microsoft announced that no new Zune hardware players would be developed, although existing models would remain for sale. The Zune had failed to capture significant market share after five years against the Apple iPod, and a recent study by NPD Group indicated that the Zune did not make the list of the five best-selling portable music players in the U.S. The iPod has been more successful because of simplicity and had better ratings. It has also been suggested that there is a much larger trend that standalone music players were giving way to smartphones with personalized, app-driven music. On October 3, 2011, Microsoft announced the discontinuation of all Zune hardware, encouraging users to transition to Windows Phone. Later, the announcement was removed and a Zune Support Team member tweeted that the page was added to the website in error. Finally, despite previous denials, the original announcement of the Zune hardware's discontinuation was restored to the Zune Support site. Discontinuation of Zune software and services In June 2012, Microsoft announced plans to discontinue all "Zune" products, and instead, Microsoft would distribute its digital media content